calculate the force of gravity between two masses of 25kg the masses are 8m apart the gravitational constant is 6.67 x 10^-11 N m^2/kg^2

Which statement is the best definition of an atom? a) anything that has mass and occupies space. b) the smallest particle that has the properties of an element. c) a substance that cannot be broken down chemically into simpler substances. eliminate d) the smallest unit of a substance that exhibits all of the properties characteristic of that substance.

What happens to the vapor pressure of a substance when its surface area is increased at constant temperature?

Two balls, each with a mass of 0.5 kg, collide on a pool table. is the law of conservation of momentum satisfied in this collision? explain why or why not.